Tankless Water Heater Pros & Cons

9 06 2013

Tankless Water Heater

Although tankless water heaters provide unlimited hot water throughout the day, there is a limit to how much hot water the unit can generate at the same time. Therefore when buying any type of water heater, tankless or not, it’s crucial to estimate PEAK DEMAND, i.e. how much hot water is used at the same time. Larger homes may require multiple water heaters.

For example, two or possibly three people might take showers or baths in separate bathrooms around the same time — typically in the morning — plus a washing machine and/or a dishwasher. Even a small whirlpool or soaking tub requires a significant amount of hot water.



  1. Plenty of hot water (no more sudden cold showers; great for filling large Whirlpool/Soaking Tubs)
  2. Saves energy (uses gas only when hot water is needed)
  3. Saves money (cut our gas bill in half because not continuously heating a large tank of water)
  4. Space saving small wall mounted box
  5. No ugly vent pipe (when outside)
  6. No enclosure to buy or build


  1. More Expensive to buy (but over time energy savings can offset higher cost)
  2. Uses more water (water must run for at least two to three minutes to heat up in addition to travel time from unit to faucet. e.g. our shower is 20′ from the unit and it takes 3-4 minutes before getting warm water.)
  3. Noise (AVOID installing on an exterior Bedroom Wall.) [When anyone uses hot water while we are sleeping, it wakes us up. BTW – The unit we have sounds like a printer.*]

Tankless Water Heater

                  **** TIPS ****

Locate any water heater as close as possible to bathrooms.

Consumer Reports has a calculation chart for storage tank water heaters that calculates gallons per minute (gpm) to help determine what size tank you need.


*In the photos is a Rinnai tankless, which has an attractive stainless steel case. For more information – http://www.rinnai.us/customer-care/support-faq

Other tankless brands include Noritz, Rheem, Jacuzzi and Bosch among others.


Finally Construction Resumes

2 08 2012

Yes, the moisture issues finally got worked out and work has resumed on the addition.  This was a monumental ordeal, but we worked through it without going crazy (well maybe just a little).  We are just thankful that our contractor did his best to remedy all the issues to our satisfaction and continued working to complete this project, well for the most part.

In hind sight another good decision we made before starting this project last year was to reduce the scope to just the Master Bedroom/Bath addition rather than also remodeling the kitchen and bumping out the front of the house at the same time.  Doing all of that work at the same time would have meant moving out and renting a house or apartment and  added significant cost to the project due to this lengthy construction delay.

A word of advice, is to do your remodel work in phases. Don’t think you have to do everything all at the same time.  Plus now we’re better educated on the process, which should help us make better decisions when the time comes to embark on our next home improvement project.

Here are images of work completed over the course of one month (April 2012).  It’s so good to finally see some progress again!

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Weeks 19-25 The Moisture Saga

26 03 2012

It’s been one month since the last post, which was spent trying to determine the cause of the moisture problem in our new vaulted ceiling.  After the roofing company repaired the top section of water damaged plywood and felt, our architect suggested doing a condensation test before closing up the ceiling with drywall.  The architect had the contractor cover the open ceiling with plastic and said to watch if any moisture forms.

Well guess what, by the next afternoon the top side of the plastic facing the ceiling was dewy and even a few water droplets had formed and dripped onto the plastic.  It was like a sauna in each joist bay in the peak of the vaulted ceiling and this went on for a few days.  Science Experiment 1 ends, but we clearly still had a moisture problem.   Read the rest of this entry »